TY  - BOOK
AU  - Soars,Liz
ED  - John , Liz Soars.
TI  - Headway workbook upper-intermediate
SN  - 0194335607
U1  - 428 
PY  - 1993///
CY  - New York
PB  - Oxford University Press
KW  - Ingles
KW  - Enseñanza
N1  - Incluye revision y respuestas; Verb forms.--Presente perfect simple and continuous.--Gerunds and infinitives.--Question forms.--Narrative tenses.--Expressing quantity.--Future forms.--Description.--Modal verbs of deduction.--Expressing habit.--Hypothesis.--Articles
ER  -